COMPABISON OF SAMPLES. 



Analysis of samples from three millers at different times. 



51 



1 Based on sample of only 80 grams. 



The results are given to show whether the separation and composi- 

 tion of the samples made by the same miller at different times may 

 be expected to be uniform. Nos. 6954 and 7795 from miller A, and 

 Nos. 6955 and 7830 from B, are Graham flour and show no greater 

 differences respectively than might be expected when one considers 

 that Nos. 7795 and 7830 were obtained six months later than Nos. 

 6954 and 6955 and therefore may have been produced from a different 

 lot of wheat. Nos. 6956 and 7824, from miller C, show the same 

 small differences but are plainly imitation Graham flours. 



An interesting incident is connected with sample No. 6956. When 

 the representative first obtained a sample of this flour one member 

 of the firm described it as being "made by grinding whole wheat, 

 removing nothing but about 3 per cent of low grade," intending to 

 indicate thus that it was .a Graham flour. The analysis of this first 

 sample led to the suspicion that it was an imitation Graham flour 

 made from very good stock. Another sample was ordered collected, 

 with the request to inquire again how the product was being made. 

 This time another member of the firm stated: "We make the flour 

 by mixing about one-fifth of pure bran and four-fifths of good first- 

 class flour." This incident shows that placing absolute reliance on 

 the statement of the people interested may lead to erroneous inter- 

 pretations and conclusions. The sample in question was made in 

 the manner indicated by the second member of the firm, namely, 

 one-fifth bran, four-fifths flour, the flour being, however, of very 

 good quality. The fact that the sample previously collected con- 

 tained but 69.2 per cent of flour passing through the 109 sieve while 

 the second sample contained over 78 per cent would simply indicate 

 that no definite means are taken to measure or weigh the amount of 

 material thus mixed. 



The analysis of three samples from the same miller is given in 

 the following table: 



